Furnace-grate.



PATENTED DBC. 8, 1907. M. WASHBURN & R; D.. GRANGER.

VVNo. 872,869.

FURNAGE GRATE.

APPLICATION FILED AUG.22,1907.

HEBT 1.

W/ TNE SSE S mns ca.. usumara PATENTED DEC. 3, 1907. M. WASHBURN & R. D. GRANGER. FURNACE GRATE.

APPLIOATION FILED AUG.22.1907.

4 sHBETs-SHBET 2.

W/TNESSES PATENTBD 1330.3, 1907.

M WASHBURN s R D GRANGBR PURNAGB GRATB. APPLIUATION FILED AUG 22 1907 g/p/y W/TNESSES A TTOHNE YS uNiTED STATES PATEN union.

MONTROSS WASHBURN, OF OSSINING, AND ROGER D. GRANGER, OF NEW YORK, N. Y.

FURNACE-GRATE.

v No. 872,869.

Specification of Letters Patent.

Patented Dec. 3*, 1907.

Application filed August 22. 1907. Serial No. 389.656.

T 0 all whom it muy concern.'

Be it known that we,- MONTRoss WASH- BURN, a resident of Ossining, county of Westchester, and State of New York, and ROGER D. GRANGER, a resident 'of the city of New York, borough of Brooklyn, county of Kings, and State of New York, both citizens of the United States, have invented new and useful Improvements in Furnace-Grates, of which the following is a full, clear, and eXact description.

This invention is an improved furnace grate, the object of which is to provide a construction ,comprising a plurality of grate sections, each carrying a plurality of pivotally supported grate bars, and an operating means for swinging the grate sections and grate bars on their individual pivots, as desired.

The invention further contemplates the provision of means for locking the several grate bars against any relative movement while the grate sections are being swung to and from a dumping position.

The invention also resides in certain special features of construction and arrangement of parts which will be fully set forth hereinafter and particularly pointed out in 'the claims.

Reference is to be had to the accompanying drawings forming a part of this speciiication, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a longitudinal vertical section through the fire-box of a furnace with the preferred embodiment of our improved grate applied thereto and showing one of the grate sections swung to a dumping position; Fig. 2 is a side elevation on an enlarged scale of one of the grate sections, the said section being partly in section on the line 2 2 of Fig. 4; Fig. 3 is a sectional view on the line 3 3 of Fig. 4; Fig. 4 is a cross section through one of the grate sections on the line 4 4 of Fig. 2; Fig. 5 is a cross section through one of the operating rods, illustrating the manner in which it is connected and disconnected with one of the grate sections;

Fig. 6 is a longitudinal section through the outer end of the operating mechanism; and Fig. 7 is a fragmentary view of the outer portion of the operating mechanism looking in the direction at right angles to Fig. 6.

Our invention as shown in Fig. 1 comprises a plurality of grate sections 10, each of which is provided with a plurality of grate bars 11, the sections being pivotally supported substantially midway their length on trunnions or pivots 12 which are revolubly mounted in notched bearings formed in side frames 13. The grate bars are also pivotally supported on individual pivots or trunnions 14 at opposite ends which rest in notched seats formed in the upper edges of their respective grate sections. These trunnions are covered by the extended ends of the bars, as best shown in-Fig. 4, which increases the effective grate area. The sides of each grate section, as best shown in Figs. 3 and 4, are rigidly connected together at the bottom by cross bars 15, and one of the said sides is constructed with inwardly projecting studs 16 which are spaced apart and receive and support a slide 17, the latter being provided with slots 18 at opposite .ends for the reception of the studs and intermediate rack-teeth 19 formed on its bottom edge. The slide 17 is also constructed with a plurality of upwardly projecting slotted seats 20, equal in number to the number of grate bars carried by each section, in the present instance shown to be four, and are engaged by studs 21 carried on the lower inner face of depending arms 22 formed integrally with, or otherwise rigidly attached to, the grate bars'. That side of each grate section which carries the slide 17 is provided with an inwardly projecting stud 23, preferably arranged between the cross bars 15 near the lower edge of the section, and serves as a pivot for a lever' 24, the top arm of which is made in the form of`a segmental gear 25 which intermeshes with the rack-teeth 19. The lower and de ending arm of the lever 24 is slightly offset, as

shown in Fig. 4, to bring it closer to a depending slotted arm` 24a rigidly attached to the grate section and provided with an angular slot 241. The arm 24 is provided with a slot 26 and an arm 27 projecting at right angles thereto longitudinally of the fire-box, the said arm being formed at its outer eX- tremity with an angular groove 28 which registers with and conforms to the slot 24b in the arm 24a.

For operating the grate sections and the grate bars carried thereby, we have shown two independent levers 29, one of which is adapted to be alternately connected to either the two forward grate sections or their grate bars, and the other serving to operate the rear section and its grate bars only. (This 30, and which carry fixed collars 31, two for each grate section, arranged respectively oppositc the slot 24b in the arml 24a and the slot 26 in the lever 24. These slots are adapted to be alternately engaged by pins 32 carried by the collars 31, the pin 32 opposite the slot 24b also operating when engaged therewith to engage the groove 23 in the arm 27 thereby 'preventing any relative movement of the grate bars-when the rods 30 are reciprocated. The reciprocation of the rods when engaged with the arms 24a and 27 causes the grate sections to swing on their piv ots to and from a dumping position. When the rods 30 are given an axial turn of ninety degrees the pins 32 in engagement with the arms 24a and 27l are disengaged therefrom, and the pins 32 opposite the slots 26 are carried thereinto. Onnow reciprocating the rods 30 the grate sections remain stationary and the grate bars'will swing back and forth i on their pivots by reason of the sliding move ment of the slide 17.

- In order to provide for the axialturning of the rods 30 at the outside of the furnace adjacent t'o the operating levers 29, they are keyed to sleeves 33, the latter being in fixed relation to collars 34- having handles 35 by which the rods 3() are revolved. The outer extremities of the sleeves 33 each pass through a bearing-box 36 formed as a part of one of the levers 29, and is provided with a head 37 which serves in connection With the collar 34 to hold the boX 36 in place. Each bearing 36 is preferably pivotally attached to the front of the furnace through the intermediary of connecting links 38 and 39, these links admitting of the levers being moved to and from the furnace in reciprocating the rods 30.

Wvhile we have described the preferred construction and arrangement of our improved furnace grate, we nevertheless regard the precise embodiment of the invention as material, and consider ourselves entitledl to such modifications as fall within the scope of the appended claims.

Having thus described our invention, We claim as new and desire to securebyLetters Patent:

1. In a grate, a plurality of pivoted grate sections, a plurality of grate bars pivotally supported on each section, and a singlemechanism operable to either swing said sections on their pivots or oscillate the grate bars on the grate sections.

2. In a grate, a plurality of pivoted grate sections, a plurality of grate bars pivotally supported on each section, an operating rod, means for axially revolving said operating rod to alternately connect it to the grate sections and to the grate bars, and means for reciprocating said rod, whereby the grate sections or grate bars with which it is connected will be swung on their pivots.

3. In a grate, a pivoted grate section, a plurality of grate bars pivotally supported on said section, an operating rod having engaging devices and means for axially revolving said rod to alternately engage said de` vices with either the grate .section or the grate bars, and means for reciprocating said rod for the purpose described.

4. In a grate, a pivoted grate section, a plurality of grate bars pivotallysupported on said section, each having a depending arm provided with a stud, a slide carried by the grate section having slots with which the studs of the grate bars engage, means for reciprocating the slide, whereby the grate bars are caused to oscillate on their pivots, and means partly included in said first-named means or swinging the grate section.

5. In a grate, a pivoted grate section, a plurality of grate bars pivotally supported on said section, an operating rod, a devicecarried by said rod, means for axially revolving the rod to engage said device with the grate section and lock the grate bars thereon against relative movement relative to the grate section, and means for reciprocating the rod, whereby the grate section 1s carried to and from a dumping position. Y

6. In a grate, a pivoted grate section having a depending slotted arm, grate bars carried by said section, an operating lever, an operating rod connected to said lever, and means carried by said rod adapted to beengaged and disengaged with the slot of said arm when the rod is revolved.

7. In a grate, a plurality ofl pivotally mounted grate bars having arms provided withstuds, a slotted slide in engagement with said studs, rack-teeth formed on said slide, a

slotted lever having a segmental gear in engagement with the racl teeth of the slide, anv

operating lever, a rod connected to said lever,

and means carried by said rod adapted to be. engaged and disengaged with the slot of said slotted lever for the purpose described..

8. Ina grate, a pivoted' grate section, aV plurality of grate bars pivotally supported on the grate section, a slide carried by the grate` section, means connecting the slide with the grate bars, whereby when the slide is reciprocated the grate bars are swung on their pivots, a lever for reciprocating the slide having a depending slotted arm, al depending slotted arm carried by the grate section, a rod, means carried by said rodV adapted to alternately engage the slots of said*y lever and` said arm when the rod is aXially revolved, and means for reciprocating the rod.

9.' In a grate, a pivoted grate section, a plurality of grate bars pivotally supported on said section, studs carried on the inner face of the grate section, a slotted slide carried on the studs, slotted means carried by the slide, depending arms carried by the grate bars having inwardly projecting studs in engage' ing arm rigidly connected to the grate section having a slot in register with the groove of said grooved arm, means adapted to alternately engage the slotted arm of said lever and the registering slot and groove of said last-named arm, and means for reciprocating said means.

l1. In a grate, a pivoted grate section, a plurality of grate bars pivotally supported on said section, a slide carried by said grate section and connected with said grate bars, a lever for reciprocating the slide having a depending slotted arm, a depending slotted arm carried by the grate section, a rod, pinsprojecting from said rod ada ted to alternately engage the slots of said ever and said arm when the rod is axially revolved, and means for reciprocatingthe rod.

12. In a grate, a pivoted rate section, a plurality of grate bars pivotal y supported on said section, a slide carried by the grate section having rack-teeth, means connecting the grate bars and slide together, whereby as the latter isr reciprocated the grate bars are swung on their pivots, a lever having a segmental gear in mesh with the rack-teeth of the slide, a reciprocating operating means adapted to be alternately engaged Awith the lever and the grate section, whereby the grate bars and grate section may be independently swung ontheir pivots.

In testimony whereof I have signed my name to this specilicationy in the-presence of two subscribing witnesses.

MONTROSS WASHBURN. Witnesses to the signature of Montross Washburn:

W. W. HoL'r, JOHN P. DAVIS. In testimony whereof I have signed my name to this speciiication in the presence of two subscribing Witnesses.

ROGER D. GRANGER. Witnesses to the signature of Roger D. Granger:

W. W. HOLT, JOHN P. DAvIs. 

